Here's what rhymes with willness.
                        
                        
                    
                                illness  stillness  Words that almost rhyme with willness
witness  business  thickness  fitness  sickness  richness  eyewitness  quickness  bigness  dimness  villus  witless  minutes  impulse  vicious  stiffness  citrus  fearless  viscous  isthmus  swiftness  billets  discus  hillocks  ingots  ingress  sinless  sinuous  cirrus  nimbus  wickets  windlass  windless  wingless  distance  instance  limits  bishops  infants  visits  forgiveness  mistress  digits  influx  tickets  bacillus  biscuits  brilliance  assiduous  grimace  listless  litmus  pickets  rivets  thickets  officious  pittance  pivots  unfitness  beardless  bigots  pickups  riddance  religious  appearance  assistance  interests  spirits  ambitious  clearance  delicious  judicious  malicious  pernicious  auspicious  hindrance  elicits  frigates  meniscus  papyrus  seditious  strictness  trinkets  avaricious  crickets  instants  resistless  triplets  hibiscus  litigious  snippets  existence  resistance  adherence  assistants  exhibits  insistence  persistence  suspicious  coherence  fictitious  inhibits  prodigious  shipments  admittance  capricious  pigments  diffidence  nutritious  propitious  cystitis  factitious  indigence  irreligious  remittance  agribusiness  mastitis  profitless  solicits  subsistence  adherents  prestigious  prohibits  archbishops  distinctness  reappearance  consistence  eucalyptus  injudicious  repetitious  surreptitious  unambitious  coefficients  interference  commitments  disappearance  perseverance  superstitious  coexistence  delinquents  adventitious  contingents  reminiscence  expeditious  incoherence  endearments  enlistments  nonreligious  infringements  nonexistence  transmittance